medart



(No Model.)

P. MEDART.

BELT PULLEY.

No. 248,597. Patented Oct. 25,1881.

ATTESYT: INVENTOR.

NITED STATES Trice.

PATENT PHILIP MEDART, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO W'ILLIAM MEDART, OF SAME PLACE.

BELT-PULLEY.

SPECIFICATION forming To all whom it may concern:

Be it known that I, PHILIP MEDAR'I, a citi' zen of the United States, residing at St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Belt-Pulleys; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to certain improvements on the subject-matter of reissue Letters Patent No. 9,671, granted to me April 19,1881, for an improvement in belt-pulleys.

The object of myimprovement is to provide a more perfect joint for the ends of the wroughtmetal rim than has heretofore been accomplished.

The difficulty heretofore met with in this class of composite belt-pulleys has been that of forming a perfect joint at the point where the ends of the rim meetwithout the use of an extra amount of metal in all the attaching lugs and a consequent increase in the weight of the pulley-spider. The defects arising from the want of a perfect joint at such point has been a tendency of the ends of the rim to move past each other in use, causing them to gradually work loose from their confining-rivets.

To effectually overcome these defects my invention consists, first, in forming the bracketlug over which the joint of the pulley-rim is made of a greater length than the balance of the bracket-lugs of the spider-arms, so as to form a perfect and firm support for the ends of the pulley-rim, and thereby overcome the dei'ects above mentioned; second, in forming the bracket-lug diametrically opposite the bracketlug over which the rim-joint is made, as above described, of an equal heaviness therewith, so as to counterbalance the same, and thereby produce an evenly-balanced pulley.

The drawing is a perspective view of a beltpulley (with parts of the rim broken away) illustrating my invention.

part of Letters Patent No. 248,597, dated October 25, 1881.

Application filed August 22, 1881. (No model.)

Referring to the drawing, the pulley will be seen to consist of a separate wrought-metal rim, A, attached by means of rivets to bracketlugs upon the ends of the arms of the pulleyspider B.

In the present improvement the joint or of the pulley-rim is placed over one of the bracket-lugs c, which lug is made of a greater length than the balance of the bracket-lugs, so as to form a perfect and rigid support for the ends of the pulley-rim in manner indicated in the drawing, and for the purpose above stated. The bracket-lug c, diametrically opposite to the joint-lug c, is made of an even heaviness therewith, or nearly approximating the same, as can be accomplished in the process of casting the same, so as to counterpoise the same and prevent the pulley from running out of balance in use. It is preferable in use to make the bracket-lug c of a width equal, or nearly equal, to that of the pulley-rim.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is- ,3

1. A composite belt-pulley having the armbracket of its spider or center over which the rim-joint is made formed of a greater length than the remainder arm-brackets of said spider, substantially as herein described, and for the purpose set forth; V Y Y 2. A belt-pulley having the arm-bracket diametrically opposite to that over which the rim-joint is made of an approximate length or weight thereto, the balance 01" the arm-brackets being of a lesser length and weight, all substantially as herein described, and for the purpose set forth.

In testimony witness my hand this 18th day of August, 1881, at St. Louis, Missouri.

PHILIP MEDART.

In presence ot'- RoB'r. Bonus, EUGENE WOLF. 

